6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

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FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

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Dated December 28, 2010

Commission File Number: 333-146371

ARCELORMITTAL

(Translation of registrant’s name into English)

19 Avenue de la Liberté

L-2930 Luxembourg

Luxembourg

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

< font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Form 20-F  x                               Form 40-F o

Indicate by check mark if the r egistrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): _____

Indicate by check mark if the r egistrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): _____

Indicate by check mark whether the registrant by furnishing the information con tained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

< font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Yes   o                                                    No x

If “Yes” marked, indicate below the file number assigned to the reg istrant in connection with Rule 12g3-2(b):  82-________

Exhibit 99.1 is hereby incorporated by reference into this report on Form 6-K.

Exhibit List

Exhibit No.		Description
Exhibit 99.1	Press release dated December 27, 2010 announcing ArcelorMittal’s purchase of call options for 26.5 million of its shares and sale of 11.5 million Treasury shares.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: December 28, 2010

By:	/s/ Henk Scheffer
	Name:	Henk Scheffer
	Title:	Company Secretary

Exhibit Index

Exhibit No.		Description
Exhibit 99.1	Press release dated December 27, 2010 announcing ArcelorMittal’s purchase of call options for 26.5 million of its shares and sale of 11.5 million Treasury shares.

EX-99.1

news release

ArcelorMittal buys call options for 26.5 million of its shares and sells 11.5 million Treasury shares

Luxembourg, 27 December 2010 - Following the reopening of its share buy-back program for up to 6% of its issued share capital announced on 26 November 2010, ArcelorMittal acquired on 18 December 2010 US dollar-denominated call options on 26,533,997 of its own shares with a strike price of USD 30.15 per share.

The 26,533,997 call options acquired allow ArcelorMittal to hedge its obligations arising out of the potential conversion of the 5% US-dollar denominated bonds convertible into or exchangeable for new or existing ArcelorMittal shares due 15 May 2014 (ISIN US042752126).

ArcelorMittal also entered into an agreement on 18 December to sell 11.5 million treasury shares through an over-the-counter block trade for a price of USD 37.8682 per share, for settlement on 30 December.

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